Lamp



FIG. 1 is a front, left perspective view of a lamp;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The dashed lines shown illustrate portions of the lamp that form no part of the claimed design. The dot-dash-dot lines immediately adjacent the shaded area represent boundary lines. 

CLAIM The ornamental design for a lamp, as shown and described. 